کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9610481 | 47200 | 2005 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Iron(II)-catalyzed enhancement of ultrasonic-induced degradation of diethylstilbestrol (DES)
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
کاتالیزور
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چکیده انگلیسی
The oxidation of the endocrine disruptor, diethylstilbestrol (DES) in aqueous media by ultrasound is significantly enhanced by Fe(II) catalyst. The observed enhancement is likely the result of increased levels of hydroxyl radicals from the iron-promoted reduction of the hydrogen peroxide produced during ultrasonic irradiation. The degradation is effective over a range of concentrations and is consistent with pseudo first-order kinetics. Relatively high concentrations of hydrogen peroxide, â¼450Â mM, are present in solution under our experimental conditions after 1Â h of ultrasonic irradiation (665Â kHz). The concentration of H2O2 in solution decreased with the addition of Fe(II) along with an increase in the degradation of DES. Hydrogen peroxide alone does not appreciably degrade DES. Our results demonstrate ultrasonic-induced degradation of DES can be accelerated with the addition of Fe(II). The combination of ultrasonic irradiation and Fe(II)-promoted conversion of H2O2 to hydroxyl radical may provide a valuable strategy for the treatment of organic pollutants.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Catalysis Today - Volume 101, Issues 3â4, 15 April 2005, Pages 369-373
Journal: Catalysis Today - Volume 101, Issues 3â4, 15 April 2005, Pages 369-373
نویسندگان
N. Ben Abderrazik, A. Azmani, C. R'kiek, Weihua Song, Kevin E. O'Shea,